Coil spring forming machine



July 1l, 1939 R. c. WINDERs 2,165,600

' con. SPRING FORMING MACHINE Filed Deo. :5, 1937 s sheets-Sheet 1 .'.u.n.l. B- A F; -1

e- IlllllllllllllllllIIIIlllmjlllllIIIIIIIIIIIIIIIIIH VL/cu 23- 9 @111m gw j fi aa Mr :l er k.

July 11, 1939. R, C wlNDERS 2,165,600

` con.. SPRING FORMING MACHINE Filed Dec. 3, 1957 8 Sheets-Sheet 2 F-B- E;

^ INVENTOR l July 11, 1939. i R. c. wlNDERs l 2,165,600

COIL SPRING FORMING MACHINE Filed Dec. 3, 1937 8 Sheets-Shea?l 3 INVENTOR t /af @L-fg@ July 11, 1939.

R. c. WINDERs 2,165,600

COIL SPRING FORMING MACHINE Filed Deo. 3, 1937 8 Sheets-Sheet 4 INV EN TOR July 11, 1939. R. c. wlNDl-:Rs

COIL SPRING FORMING MACHINE Filed Deo. 5, 1957 8 Sheets-Sheet 5 i f g1- INVENTOR July 11, 1939; R. cf/vnulnlar-:sA 2,165,600

COIL SPRING FORMING MACHINE Filed Deo. 3, 1937 8 Sheets-Sheet 6 INVENTOR COIL SPRING FORMING MACHINE July 11,' 1939. R. c. WINDERs 2,165,600

COIL SPRING FORMING MACHINE Filed Dec. 5, 1937 8 SheelLS-Sheel 8 (n) H ,It tu Patented July ll, 1939 UNITED STATES PATENT OFFICE 2,165,600 con. SPRING FoRMrNG MACHINE Robert chester windrs, Huntington Park, cam. Application December 3, l1917,.Serial No. 177,844

' `21 claims. (cino- 18) This invention relates to and has for an object the provision of an efllcient machine for forming complete coiled springs having especially formed ends to facilitate connecting a plurality of such springs together as is the practice in the manufacture of inner spring mattresses; seats, cushions and other upholstery.

An important object of the invention is to p rovide a coil springforming machine of the character described which isentirely automatic in operation and will produce a large number of completed coiled springs in a comparatively short time with the terminals of the end coils of each spring provided with formations constituting guide loops and hooks for co-operation with tie elements used to connect a group of said springs together.

A further object is to provide a machine of the character described which will operate automatically when a predetermined number of consecutive coils have been formed, to substantially simultaneously and with one operation of die elements, sever the wire between predetermined coils and bend the wire ends to form the loops and hooks as aforesaid, whereby this one operation provides like end formations for the completed spring and one end of the partially formed following spring.

A further object is to provide a machine of the character described having simple and effective means for automatically varying the diameter and the helix angle of Lthecoils during the formation thereof whereby, for example, a plurality of completed springs of the double `volute or hour glass type may be continuously produced by continuously feeding through the machine the wire for forming said springs.

The invention further resides in the particular combination and relative arrangement and construction of a plurality of cam operated devices for automatically controlling 'the operation of the machine and causing completed springs to be rapidly and successively formed upon starting the machine and thereupon continuously feeding thereto the wire from which thel springs are formed.

With the above and other objects in /view the invention consists in the novel construction and combination of parts hereinafter described, illustrated in the accompanying drawings, -and set forth in theclaims hereto appended, it being understood that various changes in form, proportion, size and minor details of construction within the scope of the claims may be resorted to without departing from' the spirit or sacrificing any ofthe advantages of the invention.

In the drawings:

Figure lis a top plan view` of a coil spring forming machine in accordance with' this invention. f

Figure 2 is afront elevation of the machine shown in Figure 1`with certain parts omitted for clarity of illustration. v

Figure 3 is a top plan view similar to Figure` 1 but with certain parts omitted to emphasize the frame structure and certain operating elements I of the machine. y

Figure 4 is a sectional view taken on the plane of line 4 4 of Figures 1`and 3.

Figure 5 is an enlarged fragmentary front elevation showing the position of the coil forming' elements when a spring is nearing completion, the spring being broken away.

Figure 6 is a fragmentary top plan view showing the parts as when in the position of Figure 5 and the nearly completed spring, the die elements being omitted and the movable ceiling roller and guide plates being broken away for clarity of illustration.

Figure 7 is an enlarged fragmentary front view similar to Figure 5 with the guard plates removed and showing the parts after a completed spring has been` cut off and the next spring is being formed.

Figure 8 is an elevationof a coiled spring of this invention.

Figure 9 is an enlarged section o`n line 9-9 of Figure 1 showing the laterally adjustable wire 'guides and back-stop means.

Figure 10 is an enlarged section on line ill-l0 of Figure 1 and a relative section on line lll-lll Figure 15 is an elevational view of one. part of the cam shown in Figure 14.

Figure 16 isan elevational View of the other part of the Lcam shown in Figure 14.

Figure 17 is a fragmentary detail` plan view of the cam operated means for controlling the movement of one of the coil forming rollers to vary the diameter of the coils.

Figure 18 is a part sectional and-part elevational view, with certain elevational parts omitted for clearness, of the cam means of Figure 17 taken on the plane of line Il-II of Figure 17.

Figure 19 vis a front elevation of the sectional and adjustable -cam for controlling and operating the means for producing a variable helix angle in the coils.

Figure 20 is a side elevation of one section of Athe cam and associated mechanism for controlling the wire severing and hook forming means. Figure 27 is a sectional view of the cam means of ure 26 taken on the l 21-21 Fig p me of une 4 and 5 is a cam operating shaft l driven from of Figure 26.

Figure 28 is a sectional view of the wire severing and hook'forming die `on the plane of line 23-28 of Figure 26.

Figure 29 is a side view of the outer half of the die with the die teeth removed.

Figure 30 is a side view of the inner half of the die with the die teeth removed.

Figure 31 is a bottom plan of the die showing the hinged joint.

Figure 32 is a back elevation of one of the d blocks and die teeth on the outer half of the die.

Figure 33 is a front elevation of one of the die blocks and die teeth on the inner half of the die showing, in conjunction with Figure 32 the relation of the wire severing teeth.

Figure 34 is an enlarged top pian view of the complete die.

Figure 35 is a fragmentary detail plan view of the cam and associated mechanism for effecting movement of the die into and out of operating position with respect to the formed coils.

Figure 36 is a sectional view of the cam means of Figure 35 taken on the plane of line 36-38 of Figure 35.

The embodiment of this invention shown in the accompanying drawings comprises a frame A, a main drive means B, wire feeding means C,

operated and controlled by cam means CI, coiling means D through which the wire is fed, cam means DI for controlling and operating said means D for varying the diameter of the coils, helix angle producing means E associatedv with the means D, cam means El for operating and controlling the means E to produce helical coils of varying helix angles, die means F for simultaneously severing the wire and forming loop and hook ends on the terminals ofeach spring, cam 'means FI for moving said die means into and vout of operative position, cam means F2 for actuating the die means to sever the wire and form the hooks on the severed ends.

In accordance with this invention the means and devices aforementioned are all driven from the main drive means B and upon starting the machine, coiled springs will be continuously formed as long as the wire is fed into the machine. It should be noted that each spring is completed and ready for use and that the continuous operation makes possible a relatively great output of completesprings in short periods oi.' time and entirely automatically. No manual adjustments or operations are required throughout the repeated cyclical operation for forming a completed spring.

It shouldbe noted that the machine of this invention is primarily designed to produce double volute or hour glass shaped springs such agbopu larlyused in making bed springs, inner-spring mattresses and cushions and other spring ll upholstery, yet it is to be understood that the machine may be employed for, making single volute and helical springs and is subject to such uses upon making minor adjustments' which will be readily apparent to those skilled in this art.

Drive means The drive means here employed and designated g B, (see Figures 1, 2 and '3) comprises a pully I driven by a suitable prime movqror power source not shown so as to rotate a pinion 2 which drives gear I mounted on a shaft 4, extending across and journalled in the frame `A. A similar shaft S is mounted above shaft I and driven by gears I and Arranged in the frame to one side of the shafts the shaft I by the pinion 9 and gear I0.

Wire feeding means The wire feed meansC (Figures 1, 2, 5, 6 and 7) comprises opposed rollers II and I2 mounted on and rotating with the shafts 41 and 5 and adapted to frictionally grip the wire W and force it to and past the coiling means D. The wire is fed to said rollers from a reel not shown.

The upper shaft 5 carrying the roller I2 is vertically adjustable suiliciently to grip or release the wire, as the adjacent bearing I3 is mounted in a slot Il (Figure 11) of the frame A. These feed rollers II and I2 are inoperative to feed the wire until forced together so as to frictionall grip the wire. f.

Cam means for controlling the wire feeding means.

The cam means CI comprises a sectional adjustablecam I5 (Figures 14, 15 and 16) iixed on `the shaft l and made of similar circular sections I6 and I1 adjustably secured together by the fastening Il. This adjustment permits of readily regulating the operation of the wire feed means without dismantling the cam or necessitating the substitution of a modified cam. The cam is provided with two operating surfaces I9 and 2l of which'the former forces the feed rollers closer together than the latter as will be later explained.

These cam faces I! and 2l operate to engage a roller 2I onv a lever 22 pivoted on the frame A whereby when lifted and lowered by the said cam it will rock a lever 23 lying thereon.

The lever 23 is fulcrumed at 24 (Figures 12 and 13) between its ends and the end which swings downward, as the lever 22 is raised, presses on the bearing I3 which is adjacent the upper roller I2 whereby to force said roller towards the roller I I and thereby frictionally grip the wire. At the f preventing distortion of the partially formed spring in the coiling means. 'The cam surfaces |9 and 26 are circumferentially spaced so as to provide a rest period when the cam does not operate to cause the rollers and |2 to` grip and feed the wire while the spring is being severed and crimped, following which the cam surface |9 again comes into action.

Coiling means The wire coiling means D here employed comprises the peripherally grooved guide rollers 25 and 26 on fixed axes on the frame A. The wire engages and moves past the upper side of the roll'er 25 and the lower side of the roller 26 as it feeds from the rollers and I2. Mounted forwardly of the roller` 26 on an adjustable fixed axis is grooved roller 21, the upper edge of which is above the plane of the lower side of roller 26 so that the wire will extend over said upper side and engage in the groove thereof.

Arranged to move arcuately relative to thek roller 21 is a grooved bending roller 28 mounted on one end of a bell crank or rocker member 29 plvoted at 38 and 3| on the frame A. The feed rollers and I2 and rollers 25, 26, 21 and 28 are mounted in alignment in a common vertical plane to prevent lateral distortion of the wire as it is fed to and coiled bythe rollers 21 and 28. After the wire passes over the top of roller 21 it extends forward and downwardly against and past the upper edge of the roller 28, the grooves in said rollers preventing lateral displacement of the wire. As the wire is forced between said rollers 21 and 28 it will be bent to formvsubstantially at coils having little or no helix angle and it is seen that the `diameter of the coils thus formed will depend on the spacing of the rollers 21 and 28. By moving the roller 28 towards and away from roller 21 during lthe feeding of the wire against and past said rollers the diameter of the coils may be varied as desired.

Cam means for varying the diameter of the coils The cam means DI comprises a sectional adjustable cam`32 as particularly shown in Figures 17 and 18 and fixed on the cam operating shaft 8. This cam has its mainr section or body 33 formed with meeting arcuate cam surfaces 34 and 35 and provided with a section 36which is radially adjustably held thereon by means of suitable fastening means 31. The cam section 36 is provided with a substantially semicircular cam surface 38 spaced inwardly of surfaces 34 and 35. The cam surfaces 34 and 35 areV circumferentially spaced and located so that at the time that the wire feed means has advanced sufficient wire to form a nearly completed or a completed fiat coil as an end coil of the spring to be formed, the surface 34 will engage the roller 39 on the lower side of a lever 48 pivoted at 4| on the frame A and lift said lever progressively with continued rotation of the cam until the high point 42 at the juncture of surfaces 34 and 35 is reached. Asthe lever 40 is lifted or rocked by 'cam surface 34 vit rocksy lever 43 through the adjustable screw 44 mounted on the lever 43. Lever 43 is vadjustablyr secured by means of the slotted head 45 and set screw 46 tto the upper end of .bell crank 29 `carrying the bending roller 28. Thus as the levers 49 and 43 are rocked as aforesaid the-bell crank 29 moves with lever 43 so as to progressivelyswing the roller 28 towards roller 21 whereby to shorten the bending radius and reduce the diameter of the coils. The surface 34 of the cam 32 is such that it will move the levers 48 and 43, bell crank 29 and roller 28 progressively inwardly towards roller 21 from the time the at end coil is formed or nearly so, until one volute series of coils of gradually decreasing diameter is formed; When the diametrically smallest coil of the series is formed, the cam surface 35 encounters roller 39 and the lever 40 is progressively lowered by the springaction of the coil being formed and thereby rocks lever 43 and bell crank 29 so that the roller 28 is gradually moved away from roller 21. This will cause'coils of increasing diameter to be progressively formed until the flat" end coil completes the double volute or hour glass shaped spring and a part, at least, of another "ilat coil as the beginning of the next spring are finally formed, at which time, the roller 39 is disengaged fromthe surface 35 and rides on the inoperative or rest surface 41 of the cam and remains in contact therewith until vthe die means F severs and crimps the wie and the feeding and bending actionsV are resumed, whereupon the surface 34 will again engage cam roller y 39 `and repeat the cycle as previously described.

It should be noted that the cam surface 38 is adapted to engage a roller 48 on one end of a lever 49 pivoted between itsr ends on lever 40.

I'he other end of lever 49 abuts on the adjustable stop 5|) on the lever 49. These parts may be adjusted to calibrate the action of the cam 32 and t-o vary its action to provide for changing the diameter characteristics of the springs made with the machine.l

Means for forming helix angles in the coils. The means E for forming lhelical `coils comprises,` as vmoreespecially shown in Figures 5, 6,

7 and 25, a U shaped member or hook 5| adapted to embrace the coils, as progressively formed, and movable axially of the coils'during the forming thereof whereby to vary the helix angle throughout each coiled spring, by deilectlng'and deforming the wire thereof helically. The member 5| is fixed to one end of a bar 52 which is reciprocally mounted in the frame A. i

Cam means for operating and` controlling helia` 1 angle forming means `The ring 56 has cam projections 51-and 58 spaced apart on the outer periphery thereof. A lever 59 is pivoted at one end as at 60 to the frame A and carries a roller 6| on its other end for engaging the cam projections 51 and 58. Mounted below and parallel to lever `59 is a toggle lever 62 `pivoted at its ends to the frame as at 63 and 64 and having the toggle joint 65 between its ends. The har 52 carrying the hook member 5| is pivoted as at 66 to the lever 62 between the pivots 63 and 65 thereof whereby toggle movement of lever 62 will reciprocate said bar. A spring 61 tends to retract bar 52 and a spring 68 tends to urge lever 59 towards anadjustable stop 69 on the frame A. Movement of the lever 59 towards said stop is prevented by the cam projections 51 and 58 engaging'l the roller 6| on said lever. An adjustable stop 18 carriedby the lever 62 engages the lever 59 toprevent movement of le'ver 6 2 in a direction which would extend the bar 52 and hook member 5| inwardlysbut allow free movement thereof outwardly against the pull of the spring 81. The lever 82 is operated to extend bar 82 and member iioutwardly by contiguous cam projections 1| and 12 arrangedvon the cam rings Il and I8 to engage roller 18 on lever 82. It should be noted that the cam projection 88 has an adjustable face plate`18-to change the action on the cam without necessitating replacing the cam. Other changes in the action of the cam to regulate the extent of move--` .hook 8| vis sustained in the plane of the rollers 21 and 28 so that no lateral or axial deformation of the wire takes place by the roller 8| of lever 58 engaging the cam projection 81. As soon as the rst flat coil is formed or nearly .formed the roller 8| moves on of cam projection 81 and the spring 88 movesV the lever inwardly from the stop 18 and against the stop 88. As the roller 8| moves off of the face of cam projection 81 the roller' 18 on toggle lever 82 first encounters cam projection 1| on outer ring 88 and the lever is given an outward movement against its. toggle joint 88 whereby the bar 52 near such joint is moved outward and the hook member 8| is moved correspondingly.

,The cam projections 1|` and 12 are so formed that the hook member 5I is progressively forced outwardly `from the plane of the grooved periphery of the forming rollers 21 and 28. This causes a helical deformation of the spirally coiling wire. which varies with each coil due to the progressive movement of the member 5|. The progressiveI magnitude of the helical deformation forms the variable helix pitch desired-.in the completed spring. y

As the machine continues to operate the roller 18 engages a portion of projection 12 on the inner ring i5 while yet in contact with a contiguous part of cam 1| and the composite action of said cam projections forces the hook member 5| outwardly to the position of maximum helical deformation and this position is maintained by the action sustaining faces of said projections during the winding of the central coils of the spring.

As the machine continues to operate, after the smallest coils at the center of the spring are formed, the hook member 8| commences to retract as permitted by the allowance action" of the cam projections 1| and 12 and the retracting action of the spring 81. .y

Thus the coils are formed for the remaining half" of the double volute spring, with a progressively decreasing helical pitch ending in a dat coil having substantially no helical deformation. When the last helical coil is ni'shed the roller 18 moves on of the cam projection 12 and at the same time the roller 6I on lever I8 is engaged by the cam projection 81 which thereby moves the lever 88 into engagement with the stop 18 whereby to sustain the toggle lever 82 in position holding the hook member 8| substantially in the plane of the rollers 21 and 28. As -the machine continues to operate the last (flat) 'coil of the spring and at least a part of .another iiat coil, as the endl of the next spring,

are formed and the composite cam 88 sustains the levers I8 and 82 in such position until the "rst spring is severed and formed with the hook ends and the first coil of the next spring is completed, whereupon the cam projections 88, 1| and 12 again go through the cycle previously described.

Die means for severing the wire and crimping the ends of the springs The die means F' (see Figures 5, 6, 7 and 28 to 34 inclusive) include a rotary shaft 18 carried by the frame `A and supporting a jaw 11 to which a companion jaw 18 is hinged as at 18. These jaws are normally below the plane of the lower side of the spring being wound by the forming rollers and are so held by a spring 88 coiled around shaft 18 and having terminals fixed to the frame A and the outer jaw 11. Upon appropriate turning of the shaft 16 as by the operation of the cam means FI, the jaws 11 and 18 are moved upwardly into position to receive the coils of the springs. Normally the hinged'jaw 18 is held spaced from the jaw 11 by a spring 8|, but is adapted to be moved towards the4 jaw 11 by the cam means F2, whereby die members (Figure 34) 82, 88, 8l, 88 and 88'on the jaw 11 and similar die members 81, 88, 88, 88 and 8| on the jaw 18 will co-operate to sever and' crimp the wire. `The die members 82 and 88 are supported by a block 82 on the jaw 11 and co-operate with the die members 81 and 88 on a block 88 carried by the jaw 18, to form a U shaped loop 88 -(Figure 8) adjacent but spaced inwardly of the end of the last coil of 'the spring being completed, and an inverted U shaped hook 88 contiguous with said loop-and at the end of said last coil. At .the same time die members 85 and 88 on a block 88 carried by the jaw 11 cooperate with the die members 98 and 8| on a similar block 81 on jaw 18 to form on the rst coil of the following spring, a loop 88 and hook 88 (Figures 6, 7 and 8), identical with those on the completed spring. It will be noted that the die members 88 and 88 respectively carried on the die supporting blocks 88 and 88 meet so as to sever the wire between the end coils of contiguous springs before the other die members come together suiilciently to crimp the loops and hooks in the wire. The crimping die members have notched outer ends which receive the wire before the severing dies come together, whereby to hold the wire against displacement from the crimping action of the die members. It should be noted that the loops and hooks formed on the ends of the springs extend axially thereof to facilitate the securing of a plurality of the springs together as is the practice in making inner spring mattresses, cushions and the like.

Cam means for moving the die means into and out of operatioe positionV As shown in Figures and 36 the means FI for moving the jaws 11 and 18 'of die means F into and out of operative position comprises a cam |88 mounted on shaft 8 and provided with peripheral operating surfaces 8|, |82 and |88 coacting with a' roller |88-on one end of a bell crank |88 lpivoted at |88 free to oscillate on shaft 8. A link |81 connects the other end of the bell crank |88 with a crank arm |88 on shaft 16 whereby to rotate the latter when the cam |88 rocks said When the last coil of the spring being completed and a part of the end coil of the f ollowing spring are formed, the cam surface engages the roller |04 and thereby rocks the bell crank so that through the link |01 and crank arm |08 the shaft 181s rotated whereby to raise the die jaws 11 and 18 into position shown in Figure 5, with the coil to'be severed and crimped lying in the notched ends of the die teeth `as hereinbefore described. The die jaws are sustained in such position by thev action ofthe cam face |02 and the cam face |03 allows the spring 80 `to return the jaws to the out-of-the-way position below the coiling means as shown in'Figure 7, as the nal operation of the machine cycles.

The spring coil engaged with the die members on the die jaws 11 and 18 asaforesaid, is held in such position by a frame carried guide plate |09` (Figures 5 and 6) and a holder member ||0 pivoted at between itsends on the frame A.

The plate |09 is disposed in front of the guide' and coiling rollers 26, 21 and 28 to prevent the coils from becoming entangled therewith and to guide the coils between the die jaws. The holder I0 is movable into and out of position (Figures 5, 6, '1 and 35) overlying the wire coil which lies upon the outer face of the plate |09. When in holding position this holder and the plate |09 prevent axial movement of the spring and coils during the severing and crimping operation of the die. Another guard plate 2 (Figures 5 and 6) is disposed below the plate |09 and in front of roller 25 for the same purpose as plate |09 and cooperates with a guide rod ||3 which is extended outwardly from the frame A through an opening in plate ||2 as will be later described, so that the wire of the coil in the die means will extend around the guide member ||3 to prevent deflection of the coil in one direction transversely of the axis thereof. The opposite side of the coil will extend between guidepins ||4 and ||5 fixed on the die jaw 11, as shown in Figures 5 and 6, to prevent lateral deflection'in the other direction. The coil being cut andcrimped is further guided into and held in the desired position by a guide arm ||6 (Figures 2, 5 and '1) depending from the crank arm 29 and` positioned between the rollers 21 and 28 and exterior of the groove `plane thereof.

'Ihe cam means F| has a cam ||1 on the bell crank |05 (Fgures 35 and 36) which, when the cam face |0| of cam |00 is operating to move the die means F into operating position, will engage roller ||8 on a lever ||9 pivoted at |20 to the frame A. When thus moved the lever ||9 willengagea stop collar |2| on a push rod |22 pivoted at |23 to the wire coil holder I whereby to swing the latter into its operative position overlying the coil of the spring engaged with the die jaws as shown in Figures 5 and 6. A spring |24 operates to return the holder. ||0 and operating means therefore to normal position.

Cam means for operating the die means to sever and crimp the coils As shown in Figures 26 and 27 the cam means F2 comprises a V shaped ring cam member |25 When the means Fl has operated as aforesaid i to move the die jaws 11 and 18 into position to properly engage the coil to be severed and crimped, the cam surface |3| of the cam |25 will engage the roller |26 and rock the lever |21 and push outwardly the plunger |32 connected by the clevis |33 with said lever. 'I'he plunger |32 is slidably supported in a suitable frame carried guide |34 and when pushed outwardly will engage the hinged jaw of the die means F whereby to move said jaw towards the jaw 11, and thereby cause the die members 82,` 83, 84, 85, 86, 81, 88, 89; 90 and 9| to first cut and then crimp the wire as hereinbefore more fully described. 'I'he severing of the wire takes place while the roller |26 is riding outward on the cam face |3| and the crimpingactlon occurs when the roller |26 is adjacent or on the high point |35 of the cam |25. When the roller |26 rides 01T the high point |35 onto the other cam face |36 the spring |29 returns thelever |21 and plunger |32 to normal position and the spring 8| forces the jaws 11 and 18 apart lwhereby to release the completed spring and the crimped end of the first coil of the spring next to be formed. At the time that plunger |32 isforced outward, the guide rod ||3 (Figure 26) which is pivoted as at |31 to the lever |21 is forced outward through the guard plate ||2 (Figure 5) into position to engage the inner side of the coil being severed and crimped to prevent lateral displacement thereof as previously described; This bar ||3 is returned to out-of-the-way position by the spring |29 at the same timethat the lever |21 and plunger |32 are retracted. It should be noted that the helix angle forming hook member 5| (Figures 6 and 25) is free to yield outwardly responsive to the outward pull caused by the action of the crimping dies, this yielding being permitted by the toggle lever 62 and spring 61 connected therewith.

As a means for guiding and leading the wire free from kinks and bends, from the source of supply not shown, to the feed rolls and I2 and for also preventing the wire from being twisted or distorted or of slipping backward between the feed rolls due to the stresses set up by the bendingv or coiling rollers and the severing and crimping dies, I provide a wire straightening device |38 (Figures 1 and 2) and a laterally adjustable guide device |39 (Figures 1, 2, 9 andy 10) through which the Wire passes to said feed rolls. 'I'he wire straightening device |38 is of standard form and requires no further description,

The 4laterally adjustable guide means |39 is best shown in Figures 1, 2. 9 and 10 and comprises an anglev bracket |40 xed on the frame A between the Wire straightening device |38 and the rollers and |2. Fixed on this bracket is an anvil |4| having a wire guiding eye |42 through which the wire passes. From the eye |42 the wire passes over and upon the anvil and then through a groove |43 in the lower side of a guide arm |44 pivoted at |45 on the bracket |40. This guide arm prevents lateral displacement of the wire as it passes between opposed peripherally grooved rollers |46 mounted on upright axes on a horizontal arm |41. 'I'his arm is pivotedasat |48 at the end thereof, opposite that carrying the rollers, to the bracket |40. The free end' of the arm |41 and the rollers |48 is forced laterally outwardly by a spring |49 and may be forced inwardly against the tension of said spring by an adjusting screw |50. This arrangement permits of positioning the rollers |46, so as to place the wire under tension and exert straightening forces pose of preventing the stresses set up in the wire (being fed from a source not shown) by the action of the feed and coiling rollers and die, from twisting and distorting the spring. To prevent back lash or slipping of the wire when the die releases thegsevered wire, a blade IBI is pivoted at its upper end as at |52 to the bracket l to swing in a spring urged arc into contact with the wire on the anvil MI. This blade will not resist the feed of wire from the anvil to the feed rolls l I and I2 but will swing so as to bind the wire tightly against the anvil incident vto but a slight back slipping of the wire, whereby to prevent the wire from slipping back from between the coiling rollers or otherwise toan appreciable extent.

I claim:

l. A machine for forming coiled springs comprising means for forming wire into coils, and means operating automatically when a predetermined number of coils has been formed for severing the wire in a predetermined coil and deforming and extending the ends of the wire axially of and inwardly from the coils, said last named means including opposed cutting dies, pairs of opposed deforming dies adjacent and on each side of said cutting dies', and means for substantially simultaneously applying all of said dies to the wire.

2. A machine for making coiled springs comprising a frame, a pair of coiling rollers arranged thereon to form into coils the wire which is forced between and against said rollers, means for continuously forcing wire between and past said rollers, means for moving one of said rollers in an arc towards and away from the other thereof, meansfor producing a helix angle in the coils formed by said rollers, including a coil embrac` ing hook movable relative to said rollers for de-` flecting the wireaxially of the coils during the forming of each thereof, and means operating automatically for moving said hook towards `and away from said .rollers while the wire is embraced by said hook.

3. A machine for making .coiled springs comprising a frame, coiling means arranged thereon to form wire into coils including rollers one of which is movable towards and away from the other, means for moving said one roller towards and away from said other roller, means for producing a helix angle in the coils formed by said rollers, including a coil engaging Ahook movable towards and away from said rollers for deflecting the wire axially of the coils during the forming of each thereof, and means for reciprocating said hook relative to said rollers and in the direction of the axis of said coils'.

4. A machine for forming coiled springs cp prising a frame, means thereon operatingv responsive to the feed of wire thereagainst for forming coils, and means operating automatically when a predetermined number of coils has been formed for substantially simultaneously angularly deforming and severing the wire between predetermined coils and forming identical hooks and open'loops adjacent the ends thus formed in severing the wire with said ends extending axially and inwardly of said coils.

5. A machine for forming coiled springs comprising a frame, means thereon operating responsive to the feed of wire thereagainst for forming coils. and means operating automatically when a predetermined'number of coils has been formed for angularly deforming and severing the wire between predetermined coils and forming the ends of said hooks extending inwardly and axially of the coils.

6. A machine for forming coiled springs comprising a iframe. means thereon operating responsive tothe feed of wire thergainst for forming coils, and means operating automatically when a predetermined number of coils hasbeen formed for severing the wire between predetermined coils and bending the ends thus formed into like sinuous portions wherebyl each spring so produced has identical sinuous portions at its ends with said ends extending inwardly. and axially of each spring.

7. A machine for forming coiled springs comprising means operating automatically forcontinuously-coiling wire which is fed to and past such means, means for feeding wire to and past said coiling means. and means operating automatically when a predetermined number of consecutive coils have been formed, for effecting infone operation, the severing of the wire between predetermined coils and the formation of like open loops extending axially of the coils .and opening outwardly thereof on the ends thus severed, whereby each spring hasv identically formed ,outwardly opening loops at the ends thereof.

8. A machine for forming coiled springs, comprising means operating automatically for continuously coiling wire which is fed to and past such means, means for feeding wire to and past said coiling means. and means operating automatically when a predetermined number of consecutive coils have been formed for effecting in one operation the severing of the wire between predetermined coils and the formation of like sinuous portions at the ends thus severed.

'9. A machine for forming coiled springs comprising means operating automatically for continuously coiling wire as the wire is fed thereto, means for feeding wire to said coiling means, and means operating automatically when the last coil necessary to form a spring having a predetermined number of coils and at least a part of the first coil of the following spring are formed, for substantially simultaneously severing the wire between said iirst and last coil and sinuously deforming in a direction substantially axially of the coils, the ends thus formed.

10. A machine for forming coiled springs comprising means operating automatically for continuously coiling wire as the wire is fed thereto, means for feeding wire to said coiling means, and means operating automatically when the last coil1necessary to form a spring having a predetermined number of coils and at least 'a part of y the first coil of -the following spring are formed, for substantially simultaneously severing the wire between said ilrst and last coil and sinuously deforming'in a direction substantially axially of the coils, the ends thus formed, and means for engaging and preventing the coils from being coils, the ends thus formed, and meansproviding for the slipping of the wire relative to said feed means incident tothe longitudinal pull onthe wireoccasioned by the severing and end deformation operation.

12. A machine for forming coiled springs comprising means operating automatically for continuously coiling wire as the wire is fed thereto, means for feeding wire to said coiling means, and means operating automatically when the last coil necessary to form'v a spring having a predetermined number of coils and at least a part of the first coil of the following spring are formed, for substantially simultaneously severing the wire between said first and last coil and sinuously deforming in a direction substantially axially of the coils, the ends thus formed, and means providing for the slipping of the wire relative to said feed means incident to the longitudinal pull on the wire occasioned by the severing and end deformation operation, and means actuated by prising relatively movable coiling rollers between, against and past which wire is moved to form coils, means for feeding wire against and past said coiling rollers, means for bodily moving one roller towards and away from the other roller during the formation of the coils for varying the diameter of said coils, a member for helically deforming the coils movable axially of said coils into and out of the plane of the p0rtions of the coiling rollers which engage the wire,

means for reciprocally moving said last named` member axially of and in engagement with the coil being formed by said coiling rollers for helically bending said coil, a die means normally disjposed to one side of the springs being formed and being operable to sever the wire and deform the ends thus formedA in one operation, means automatically moving said die means into position to sever and deform the wire when the last coil of one spring and a part of the first coil of the next spring are formed, means automatically operating said die means to sever and deform the wire when said die means is disposed in said operative position and means for automatically moving the die means into said out-of-the-way position following the severing and deforming operation thereof.

14. A machine for forming. coiled springs comprising relatively movable coiling rollers between, against and past which Wire is moved to form coils, means for feeding wire against and past said coiling rollers, means for bodily moving one roller` towards and away from the other roller during the formation of the coils for varying the diameter of said coils, a member movable axially of said coils into and out of the plane of the portions of the coiling rollers which engage the wire, means for` reciprocally moving said last named member axially of and in engagement with the coil being formed by said coiling rollers for helically bending said coil, a die means normally disposed to one side of the springs being formed and being operable to sever the wire and deform the ends thus formed in one operation, means automatically moving said die means into position to sever and deform the wire when the last coil of one spring and a part of the rst coil of the next spring are formed, means automatically operating saidl die means to sever and deform the ,wire when said die means is disposed 'in said operative position and means for automatically moving the die means into said out-ofthe-way' position following the severing and de- 15. A machine for forming coiled springs comprising relatively movable coiling rollers between, against and `past-which wire is moved to form coils, means for feeding wire against and. past said coiling rollers, means for bodily moving one roller towards and away from the other roller duringthe formation of the coils for varying the diameter ofsaid coils, a member movable axially of said coils into and out of the plane of the portions of the coiling rollers which engage the wire, means for reciprocally moving said last named member axially of and in engagement/'with the coil being formed by said coiling rollers for helically bending said coil, a die means normally disposed to one side of the springs being formed and being operable to sever the wire and deform the ends thus formed in one operation, means automatically moving said die means into position to sever and deform the wire when the last coil of one spring and a part of the first coil of the next spring are formed, means automatically operating said die means to sever and deform the wire when said die means is disposed in said operative position, means for automatically moving the die means' into said out-of-the-way position following the severing and deforming operation thereof, means for rendering said wire feed means operative to allow the wire to slip therethrough during the severing and deforming operation of said die means, and means for preventing a backward movement of said wire relative to said feed means when the wire is severed.

16. Av machine for forming coiled springs comprising means for automatically and continuously coiling wire which is fed thereto, means for feeding wire thereto, die means for severing and deforming the wire between the last coil of a completed spring and the first coil of the following spring, means normally holding said die means to one side of the coils being formed by said coiling means, means operating automatically when said rst and last coils are formed for moving said die means into engagement with the wire between said first and last coils, means operating automatically when said die' means is in engagement with said wire for operating said die means to sever the wire and deform the ends thus formed in one operation, and means for returning the die means to an inoperative position to one side the forming path of said coils upon completion of said severing and deforming operation. i

17. A machine for forming coiled springs comprising means automatically and continuously coiling wire which is fed thereto, means for feeding wire thereto, die means for severing and deforming the wire between the last coil of a completed-spring and the first coil of the following spring, means normally holding said die means to one side of the coil being formed by said coiling means, means operating automatically when said rst and last coils are formed for Amoving said die means into engagement with the Wire between said first and last coils, means operating automatically when said die means ls in engagement with said wire, for operating said die means to sever the wire and deform the ends 75 thus formed inone operation and means for returning the die means to inoperative position to one side of the forming path of said 601B. upon completion of said severing and deforming operation. and means automatically regulating said feeding means to permit the wire to slip relative thereto during the operation of said die means and'to restore said feeding means to operative feeding of the wire when said die means moves into inoperative position. A

18. A machine for forming coiled springs comprising means operating automatically for continuously coiling wire as the wire is fedy thereto, means for lfeeding wire to said coiling means. and means operating automatically when the last coil necessary to form a spring having a predetermined number of coils andat least apart of the first coil of the following spring are formed, for substantially simultaneously severing the wire between said first and last coil sinuously deforming in a direction substantially axially of the coils,` the ends thus formed, and wire guide means through which the wire passes to said feeding means, including guide roller between and with which said wire engages, and means for adjusting said rollers transversely of the direction of feed of said wire.

distorting 19. In a spring coiling machine, aframe. means thereon for forming wire into coils. and means cooperating with said coiling means for helically tbewireasitiscoilemincludnga member reciproeaily movable for engaging and :deiiecting the wire axially of the coils. a shaft -shaft during operation of said cam means.

20. Die' means for severing and deforming wire, .u

including severing dies. and a plurality of de'- forming dies arranged .0n opposite sides of the severing dies for deforming in opposite directions the ends formedby the severing of the wire.

21. A machine for forming wire coils, including means for forming. a plurality of consecutive wire coils. and means for severingthe wire between predetermined coils and deforming in vop-vposite directions the ends formed by the severing of the wire. l

ROBERT CHESTER, WINDERS. 

